*{
    margin: 0px;
    padding: 0px;

}

body>div{
    width: 1200px;
    background-color: rgb(250 250 250);
}




.logo{
    background-image: url("../img/logo.png");
    width: 51px;
    height: 51px;
    margin: 10px;
}

.top .chines{
    font-size: 20px;

}
.top .englis{
    font-size: 12px;
    margin: 0px 20px 0px 0px;
}

.nva>div{
    padding: 15px;
    cursor: pointer;
    line-height: 51px;
}
.nva>div:hover{
    background-color: coral;
    color: white;

}

.top-img{
    background-image: url(../img/banner2_on6y.jpg);
    /*width: 1920px;*/
    /*height: 480px;*/
    width: 1200px;
    height: calc(1200*480px/1920);
    background-size: 100% 100%;

}



.top-img>div>div{
    margin: 20px;
    font-size: 30px;
    color: coral;
}

